Composite modified starch for secondary sizing of electronic glass fibers and preparation method of composite modified starch

By preparing composite modified starch, the problems of uneven sizing film and insufficient fiber bonding force in the re-sizing of electronic glass fibers were solved, achieving flexibility and easy desizing of the sizing film, reducing ash residue and desizing load, and improving the stability of the weaving process and the ease of wastewater treatment.

CN122356321APending Publication Date: 2026-07-10河南新孚望新材料科技有限公司
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Patent Information

Application Number
CN202610725283.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing electronic glass fiber resizing materials suffer from problems such as uneven sizing film, increased fiber hairiness, weaving friction damage, decreased fabric smoothness, and unstable desizing process. In particular, the bonding force between high amylose and glass fiber surface is insufficient, making it difficult to form a flexible and easily desizing sizing film.

Method used

A high-amylose starch suspension was formed using deionized water and sodium sulfate. A low-ash N-hydroxypropyltrimethylammonium-hydroxypropylsulfonic acid diion polyglycerol borate glass affinity modifier was added, which then reacted with sodium hydroxide and acrylamide to form carbamoyl ethyl modified starch. A methoxy polyethylene glycol succinate monoester-aminopropylsilaneamide low-ash flexible film-forming modifier and vinyl acetate were then added. Finally, the viscosity of the slurry was adjusted with an oxidant to prepare the composite modified starch.

Benefits of technology

It improves the flexibility and transparency of the sizing film, enhances fiber surface adhesion and weaving protection, reduces ash residue and desizing load, and improves the stability of the weaving process and the ease of wastewater treatment.

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Abstract

The invention relates to the technical field of electronic glass fiber sizing materials, and discloses composite modified starch for secondary sizing of electronic glass fibers and a preparation method of the composite modified starch. Deionized water, high amylose, sodium sulfate, a sodium hydroxide solution, acrylamide, vinyl acetate and an oxidizing agent are used as main raw materials. A low-ash hydroxypropyl trimethyl ammonium hydroxypropyl sulfonic acid double-ion polyglycerol borate glass affinity modified compound and a methoxy polyethylene glycol succinic acid monoester aminopropyl silane amide low-ash flexible film-forming modified compound are introduced; the preparation method comprises the following steps: suspension dispersion, carbamyl ethyl modification, composite esterification modification, oxidation viscosity reduction, neutralization, centrifugation, washing, drying and crushing. The obtained composite modified starch has the characteristics of low ash content, good film-forming property, flexible and transparent serous film, stable viscosity, strong affinity with the surface of electronic glass fiber, easiness in desizing and low residue.
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